[vtkusers] Urgent !! interactor problem

[exomind]

I want to render the deformation of a molecular structure (polydata type). To
do this, I try to render all the actors (store in gfx.nma) and hide all of
them, after that as you can see, I show one actor and i render the scene.
the rendering is good, but i lose the interaction with my actor.
how can i maintain the interactor during the rendering loop ?
Should i use another method to represent the deformation ?
AnimationScene/Cue ? Transformation ? 



 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#
def mol_nma_renderer(gfx):
       
        gfx.renderer = vtk.vtkOpenGLRenderer()
        gfx.renwin.AddRenderer(gfx.renderer)
        beg=1

        for mol in gfx.nma:
                gfx.renderer.AddActor(mol.acteur)
                mol.acteur.VisibilityOff()
               
        gfx.renwin.SetDesiredUpdateRate(60)# useful ?
        gfx.iren.SetStillUpdateRate(60)
        while 1:
                for mol in gfx.nma:
                        mol.acteur.VisibilityOn()

                        gfx.renwin.Render()
                       
                        mol.acteur.VisibilityOff()
        mol.acteur.VisibilityOn()

 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#
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